Reorganize to match skills directory structure

- Move cpc_direct_stations.py to scripts/
- Rename CLAUDE.md to SKILL.md
- Add .gitignore for Python cache files

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,4 @@
+__pycache__/
+*.pyc
+*.pyo
+.pytest_cache/